Iesuke (家助) is counted among the representative swordsmiths of Oei-era Bizen, standing alongside Morimitsu, Yasumitsu, and Tsuneie as a principal figure of the Osafune school during the early Muromachi period. Tradition holds that the founder of the Iesuke line was a son of Hatakeda Moriie, the first generation of the Bizen Hatakeda lineage, and that he worked around the Bun'ei era (1264-1275); however, among extant signed works, none are seen that predate the Oei era, and the earliest dated examples bear inscriptions from around Oei 3 (1396). Smiths using the same name continued through several generations and flourished across the Muromachi period, though the details of each generation are not clearly established. An unsigned blade attributed to the Nanbokucho period and a work bearing an orikaeshi-mei corresponding to a smith active around Bunwa (c. 1352-1356) attest to earlier activity under the name, yet the core body of Iesuke's oeuvre belongs firmly to the Oei period. His lineage is thus understood as part of the broader Osafune tradition that took as its ideal the work of the Kamakura-period Osafune masters and Ichimonji blades, presenting a deliberately revivalistic aspect.

Within his workmanship, two distinct stylistic modes are observed. The first and more characteristic manner displays the typical Oei-Bizen hamon of gunome mixed with choji, frequently incorporating koshi-biraki gunome (open-hipped gunome) and small notare elements, with ashi and yo entering well and kinsuji and sunagashi appearing within the tempered area. The nioiguchi is bright and tends toward a tightened character, and the temper is predominantly nioi-deki with a ko-nie tendency. The second mode employs a more gentle, suguha-toned hamon enlivened by subtle activities. In forging, his works consistently show itame-hada mixed with mokume and nagare-hada, with an overall tendency toward standing grain and chikei entering frequently. Both bo-utsuri and midare-utsuri appear across his oeuvre. The steel often displays a clear kana-iro tone of striking beauty, and the jihada, though showing bold flowing grain, is well-refined with an attractive urumi. His boshi is characteristically midare-komi, turning back in ko-maru or with a slightly pointed feeling.

Although Iesuke's name is not as widely known as those of Morimitsu and Yasumitsu, the NBTHK setsumei repeatedly affirm that his workmanship is, in technical terms, in no way inferior to that of his celebrated contemporaries. Indeed, works such as the Tokubetsu-Juyo tachi dated Oei 19 (1412), with its imposing and dignified presence and especially splendid hataraki within the temper, indicate that he deserves to be evaluated more highly. Signed works by the Bunwa-era Iesuke are exceedingly rare and carry high value as reference material, while the Oei-period blades demonstrate a mastery of the revivalistic Oei-Bizen idiom at its finest. His oeuvre encompasses both bold, richly patterned compositions and restrained, straight-tempered works of quiet elegance, revealing a smith of considerable range whose legacy constitutes an essential chapter in the history of the Osafune school.